Aerial photo taken on Sept 2, 2018 shows the construction site of the 12th China (Nanning) International Garden Expo in South China’s Guangxi Zhuang autonomous region. The garden expo will be held in Nanning in December of 2018. [Photo/Xinhua]

Aerial photo taken on Sept 2, 2018 shows the construction site of the 12th China (Nanning) International Garden Expo in South China’s Guangxi Zhuang autonomous region. [Photo/Xinhua]

Aerial photo taken on Sept 2, 2018 shows the construction site of the 12th China (Nanning) International Garden Expo in South China’s Guangxi Zhuang autonomous region. [Photo/Xinhua]

Aerial photo taken on Sept 2, 2018 shows the construction site of the 12th China (Nanning) International Garden Expo in South China’s Guangxi Zhuang autonomous region. [Photo/Xinhua]

Aerial photo taken on Sept 2, 2018 shows the construction site of the 12th China (Nanning) International Garden Expo in South China’s Guangxi Zhuang autonomous region. [Photo/Xinhua]